Estimate A number that is close to an exact answer. An approximate answer.

Estimate A number that is close to an exact answer. An approximate answer.

Inverse Operations Operations used to undo each other + - X

Product The result of multiplying two factors together. 3 x 4=12 Factor x Factor=Product

Sum Answer to addition problem 4+5=9 Addend + Addend= Sum

Difference Answer to a subtraction problem 10-3=7 Minuend-subtrahend =difference

Operation A mathematical process (+, -,, ) used to solve a number sentence.

Distributive Property lets you break an operation into parts by breaking apart the addends so the multiplier is shared with the addends a (b+c)=(a b)+(a c).

Quotient The answer when dividing the dividend by the divisor.

Expression A mathematical sentence that may contain numbers and variables.

Variable A lowercase letter used in a number sentence to represent a missing number.

Evaluate Find a solution to an expression.

Order of Operation Rules that give the order in which to calculate an expression: 1. Parentheses 2. Exponents 3. Multiplication or Division 4. Addition or Subtraction Please Excuse My Dear Aunt Sally.

Commutative Property In multiplication and addition, changing the order of a number sentence does not change the answer a b=b a; a+b=b+a.

Associative Property In multiplication and addition, changing the grouping of a number sentence does not change the answer (a b) c=a (b c); (a+b)+c=a+(b+c).

Identity Property States that when multiplying by 1 or adding 0 to any number we will get the original number. 3*1=3 4+0=4 reflection

Zero Property Anything multiplied by zero is zero. 2568791564861897*0=0

Equation A number sentence with an equal sign. = 3+4=7

Solution A value that when substituted for the variable, makes an equation true. n+3=7 n=4

Congruent Having same size and shape.

Function Relationship between two quantities in which one depends on the other. Rule of an in and out table.

Inequality A mathematical sentence that contains the symbols<, >,,, or. 3 > 2

Equivalent Decimal Decimals that name the same number or amount. 0.3 = 0.30

Range In a set of data, it is the difference between the greatest number and the least number. 1, 3, 14, 15, 2, 3, 4, 6, 16 Range 16-1= 15

Median In a set of data, it is the middle number when the data is in order. 1, 3, 14, 15, 2, 3, 4, 6, 16 1, 2, 3, 3, 4, 6, 14, 15, 16 Median = 1. Put data in order 2. Cross out numbers on either end 3. Find the only number left in the middle.

Mode In a set of data, It is the number that occurs most often after put in order. 1, 3, 14, 15, 2, 3, 4, 6, 16 1, 2, 3, 3, 4, 6, 14, 15, 16 Mode =3

Mean In a set of data, it is the average. 1. Order data 2. Add together 3. Divide by the number of pieces of data 1, 3, 14, 15, 2, 3, 4, 6, 16 1, 2, 3, 3, 4, 6, 14, 15, 16 Mean =7.111

Survey A method of gathering information about a group

Population The entire group of objects or individuals considered for a survey.

Frequency table A table that uses numbers to record data about how often something happens.

sample A part of a population.

Pictograph A graph that displays countable data with symbols or pictures.

Circle graph A graph that shows how parts of the data are related to the whole and to each other.

Bar graph A graph that uses horizontal or vertical bars to display countable data.

Line graph A graph that uses line segments to show how data changes over time

Histogram A bar graph that shows the number of times data occurs within intervals.

Stem-and leaf plot A table that shows groups of data arranged by place value

Categorical data When graphed, data that shows groups or choices in any order.

Numerical data When graphed, data that shows numbers in order on some numerical scale of the graph.

multiple The answer to a multiplication problem. First 5 multiples of 5: 5:5, 10, 15, 20, 25.

Least common multiple The least number, other than 0, that is a common multiple of two or more numbers.

Divisible A number is divisible by another number if the quotient is a counting number and the remainder is zero.

factor A number multiplied by another number to find a product.

Greatest Common factor The greatest factor that two or more numbers have in common. GCF (18,30) =6

Base A number used as a repeated factor.

Exponent A number that shows how many times the base is used as a factor.

Square number The product of a number and itself.

Square Root The base that was multiplied by itself to get a square number.

Factor trees A diagram that shows the prime factors of a number.

Prime factorization A number written as the product of all prime numbers

Numerator Top number of a fraction; the part of the whole

Denominator Bottom number of a fraction; the whole

Equivalent fraction A fraction that has been multiplied or divided by a fraction of one that still represents the same amount.

Simplest form When the numerator and the denominator have only one as their common factor. ¼ 1: 1 4:1, 2, 4 Reduce, simplify

Mixed number A whole number and a fraction together. 2 ½

Common denominator Denominators that have a common multiple. 3 2 4 4

Approximation To calculate an estimated answer; not an exact. (ABOUT)

Ratio Comparison of two quantities.

Equivalent Ratios Ratios that make the same comparisons

Proportion An equation that shows that two ratios are equal.

Rate A ratio that compares two quantities that have different units of measure.

Percent Ratio of a number to 100. 23 to 100 = 23%

Outcome Possible result

Equally Likely Equal chances of occurring (happening).

Event A set of one or more outcomes

Theoretical Probability What should happen or What do you think will happen.

Experimental Probability What actually happened in an experiment.

Point Is an exact location in space.

Line Is a straight path in a plane, extending in both directions with no endpoints.

Line Segment Is a part of a line between two endpoints.

Ray Is a part of a line that begins at one endpoint and extends forever in one direction.

Plane Is a flat surface that extends without end in all directions.

Angle Two rays that have a common endpoint or vertex.

Right angle Is an angle that measures 90

Acute Angle Angle less than 90

Obtuse An angle that measures greater than 90 and less than 180

Straight Angle Is an angle that measures 180

Parallel lines Are the same plane and remain the same distance apart so they will never intersect.

Intersecting lines Are the same plane that cross at exactly one point.

Perpendicular Lines Two lines in a plane that intersect to form right angles.

Skew lines Are lines that are not in the same plane, are not parallel, and don not intersect.

Protractor Tool used to measure angles in degrees.

Circle Is closed plane figure with all points on the figure in the same distance form a center point.

Radius A line segment with one endpoint at the center of the circle and the other endpoint on the circle

Diameter A line segment that passes through the center and has both endpoints on the circle.

Chord A line segment with its endpoints on the circle.

Corresponding sides Are sides that are in the same relative position in a different figure.

Corresponding angles Angles that are in the same relative position in a different figure.

Polyhedron A solid figure with faces that are polygons.

Prism A polyhedron that has two congruent and parallel polygons as bases.

Base A plain figure usually a polygon or circle which is used to partially describe some solid figures

Pyramid a polyhedron with only one polygon base. All the faces are triangles that meet at a common vertex.

Faces All polygons that are flat surfaces of a solid figure. face

Edge The line where two faces meet. Edge

Vertex The point where three or more edges meet. Vertex

Net A two dimensional pattern that can be folded into a three dimensional polyhedron

Integers The set of whole numbers and their opposites

Positive integer Are all whole numbers that are greater than zero; to the right of zero or above zero.

Negative integer Are all whole numbers that are less than zero; to the left or below zero.

Absolute Value Is its distance from 0 on a number line.

Coordinate Plane Two intersecting and perpendicular number lines.

Origin Point where the two lines intersect (0,0).

Linear Length; inches, feet, yards, miles, meters, centimeters millimeters,

Perimeter The measurement of the distance around a closed plain figure.

Circumference The distance around a circular object

Pi The ratio of the diameter and the circumference is about 3.14.

Surface Area Sum of all the areas of the faces of a solid figure

Volume The amount of space a solid figure occupies.

Cubic units The units volume is measured in.